RESULTS OF METEOROLOGICAL OBSERVATIONS. 



215 



In the order a, b^ c & d, 



{a). 



(6). 







Annual mean temperciture. 



Animal mean temperature. 



1 



1837 45.72 



1851 47.75 





8 46.10 



2 47.09 





9 46.72 



3 48.30 





1840 47.00 



4 47.97 





1 46. 3() 



5 46.70 





2 47.44 



6 44.97 





3 44.70 



7 45.94 





4 48.77 



8 47.64 





5 47.01 



9 47.32 





6 48.26 



1860 47.58 





7 46.44 



1 47.31 





8 47.94 



2 47.18 





9 47.59 



3 47.30 



655.02 



1850 47.97 



1864 47.73 



660.84 



655.02 



660.84 



1315.86 for 28 years. 

 47.00 mean. | 



Mean 46.79 of 1st 14 years. 



Mean 47.20 of 2d 14 years. 



{€)• The range of annual mean temperature is here seen to be from 

 44°. 7 in 1843, to 48°. 3 in 1853. The annual means, also, are only twice 

 below 45°, and only twice above 48°. 



(<l). In the 28 years, the range has been, at the hours of observation, 

 from 102° down to 20° below zero, or equal to 122° ; and the same night, 

 at 3 a.m. was 25° below. 



To show, on a moment's inspection, the relative temperature of unj month. 

 or half-month, the following Table has been made with much care. The 

 mean temperature of any month or half-month in the 28 years is simply 

 compared with the general average of that time at the bottom. Thus, the 

 general mean of the first half of January 1837 is 25°. 92, while the mean 

 of that half in 1837 is 17°.02, or very cold ; in 1856, is 15°. 91, still colder; 

 in 1857, is 17°. 04, less severe ; in 1858, is 32°. 95, warm for the season ; 

 and in 1838, is 36°. 67, very warm for this half of January. Sp we see that 

 both halves of January 1856 and 1857 were far below their general means; 

 and that the first half-months of February 1856 and 1857 were also very 

 cold, while the first half of February 1850 was 34°. 55, very warm for the 

 season, and of 1853 was 35°. 05, still warmer. Also the general mean of the 

 first half of December was 30°. 96, and of that half in 1861 was 37°. 71, 

 very warm for the season, as many may recollect ; for the mean tempera- 

 ture of some of its days was above 55°, and one exceeded 60°. 



